The keto diet has gained popularity for weight loss and blood sugar management, but is it safe for people with diabetes or prediabetes?

A ketogenic diet is very low in carbohydrates and higher in fats. Because carbohydrates have a major effect on blood glucose, reducing them significantly may help some people experience lower blood sugar levels and improved insulin sensitivity.

However, keto is not automatically safe or suitable for everyone. People with diabetes—especially those taking insulin or certain glucose-lowering medicines—may face a risk of hypoglycemia when carbohydrate intake is drastically reduced. In some cases, medication adjustments and regular blood glucose monitoring may be necessary.

For people with prediabetes, a lower-carbohydrate eating pattern may support weight management and blood sugar control, but a highly restrictive ketogenic diet is not the only option. A balanced diet rich in vegetables, fiber, lean proteins, healthy fats, and minimally processed foods can also be effective.

Before starting keto, speak with your doctor or a qualified dietitian. Your medications, health conditions, nutritional needs, and blood sugar levels should all be considered.

Bottom line: Keto may offer benefits for some people, but personalized medical guidance is important when diabetes or prediabetes is involved.